Based on your post and code posted above, I created / added a new .cs in the theme / standard folder (as I am using standard theme).

I named the .cs as PostView.ascx.cs

Since, I added a new .cs, I thought it is a good idea to rebuild the solution (I am using VS 2012, installed blogengine 2.8 source code version on my local machine)

I am getting this error in webconfig:

Error 28 It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. C:\Users\Downloads\Projects\BlogEngine\BlogEngineSC\Source\BlogEngine\BlogEngine.NET\setup\SQLServer\Web.Config 10

FYI.....I am using SQL Server Database

I am getting this error too:

Error 31 The name 'AuthorDetails' does not exist in the current context c:\Users\Downloads\Projects\BlogEngine\BlogEngineSC\Source\BlogEngine\BlogEngine.NET\themes\Standard\PostView.ascx 20 5 C:\...\BlogEngine.NET\

I am using standard and also the FlatBlog theme. I would deeply appreciate help with the code. I will keep an eye on this topic for your reply.

Also, on the homepage where all the blog posts are populated, I would like to display author image / avatar along with each post.

So I need 3 things:

1) Author image on homepage with every post
2 & 3) When someone clicks on the title of the post, the blog post page appears, on that page I want author image right next to the post and at the bottom, About Author.

In PostView.ascx the first line has been changed to reference your new code behind file PostView.ascx.cs

In PostView.ascx the function GetAuthorDetails(int width, int height, bool includeSummary) is being called in two different places, the first for post lists and the second for the main post. So for the post list the image size is set smaller and does not include
a description and in the actual post the image is set larger and includes a description/author summary.

Of course, everything is dependant on user profiles being reasonably well filled out.

The following code is for the standard theme. you should be able to copy and paste, note that elements have class names that you can style with CSS.

1) How to make the image of author as image link and link with the author's posts ?
2) How to display author's full name (first and last) right with the image ?
2) Is it possible to have public profile for users in Blog Engine ? if yes, how ? how to make image link navigate to public profile page of author in this case ?